FCLOSE(3) Linux Programmer's Manual FCLOSE(3)
NAME
 fclose - close a stream
SYNOPSIS
 #include <stdio.h>
 int fclose(FILE *stream);
DESCRIPTION
 The fclose() function flushes the stream pointed to by stream (writing
 any buffered output data using fflush(3)) and closes the underlying
 file descriptor.
 The behaviour of fclose() is undefined if the stream parameter is an
 illegal pointer, or is a descriptor already passed to a previous invo-
 cation of fclose().
RETURN VALUE
 Upon successful completion, 0 is returned. Otherwise, EOF is returned
 and errno is set to indicate the error. In either case, any further
 access (including another call to fclose()) to the stream results in
 undefined behavior.
ERRORS
 EBADF The file descriptor underlying stream is not valid.
 The fclose() function may also fail and set errno for any of the errors
 specified for the routines close(2), write(2), or fflush(3).
ATTRIBUTES
 For an explanation of the terms used in this section, see at-
 tributes(7).
 +----------+---------------+---------+
 |Interface | Attribute | Value |
 +----------+---------------+---------+
 |fclose() | Thread safety | MT-Safe |
 +----------+---------------+---------+
CONFORMING TO
 POSIX.1-2001, POSIX.1-2008, C89, C99.
NOTES
 Note that fclose() flushes only the user-space buffers provided by the
 C library. To ensure that the data is physically stored on disk the
 kernel buffers must be flushed too, for example, with sync(2) or
 fsync(2).
SEE ALSO
 close(2), fcloseall(3), fflush(3), fileno(3), fopen(3), setbuf(3)
COLOPHON
 This page is part of release 5.10 of the Linux man-pages project. A
 description of the project, information about reporting bugs, and the
 latest version of this page, can be found at
 https://www.kernel.org/doc/man-pages/.
GNU 2016年12月12日 FCLOSE(3)